Incandescent-lamp burner.



No. 683,767, Patented Oct. 1, IQOI. H. HURWITZ & A. SCHAPIRO.

INCANDESCENT LAMP BURNER.

IApplicMion filed Jun: 22, 1901.)

(No Model.)

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UNITED ST TES PATENT OFFICE.

HERMANN IIURl/VITZ AND AISIK SCHA PIRO, OF BERLIN, GERMANY.

lNCANDESCENT-LAMP BURNER.

SPECIFICATION forming part of Letters Patent N 0. 683,767, dated October 1, 1901.

Application filed June 22, 1901. Serial No. 65,649. (No model.)

To all whmn it may concern:

Be it known that we, HERMANN Hoawrrz and AIsIK SCHAPIRO, subjects of the Emperor of Germany, residing at 36 Stralauer street, Berlin, Germany, have invented certain new and useful Improvements in Incandescent- Lamp Burners, of which the following is a specification.

Our invention relates to incandescent-lamp burners for oil-lamps of that class in which the gases to be burned pass off from the inner surface only of the wick, the upper end and exterior of the wick being to that end covered by a flanged outer tube, while the area of the exposed inner surface of the wick is determined by a cylindrical gas-regulator which carries a spreader that imparts the right form to the flame. Three streams namely, a gas-stream and outer and inner air-streams-are necessary for producing-the blue flame; but prior to this invention no means for regulating and proportioning the three streams,- so that smoking is avoided and perfect combustion is attained, has been produced. These advantages in a blue-flame oil-lamp are attained by the present invention, which consists of certain features of construction and combinations of parts to be hereinafter described and finally claimed.

In the accompanying drawings, Figure l is a vertical central section of the entire burner in burning position, an incandescent mantle being indicated in dotted lines; and Fig. 2 is a vertical section of the same in position for being lighted.

The exterior wick-tube Ct for wick b is provided at its upper end with a flange or cap 0, while the inner wick-tube d terminates a suitable distance from the flange c to expose the inner surface of the upper end of the wick. An adjustable cylindrical gas-regulator 2 moves within the upper end of'the inner wick-tube and is adapted to enlarge or reduce the area of the exposed inner surface of the wick or to entirely inclose the wick. A stem f, supported in line with the axis of the gas-regulator e, carries at its upper projecting end a cap or disk shaped flamespreader g, the diameter of which approximates that of the said gas-regulator. Stem f is continued downwardly below the gasregulator e and is made in the form of a rack,

so that a pinion h, meshing with the teeth of the rack, may move the stem up or down. The burner-tube 7c is so positioned that its upper inner flange will lie in a plane separated from the flange c.

A supply of air flows up through the inner wick-tube d, a supply of gas from the exposed area of the wick, and an additional airsupply through the space between the outer wick-tube a and the outer burner-tube it, so that there are two air-supplies which mix with the gas'stream at its inside and its outside.

In the present invention not only an inner air-supply, but also an outer air-supply, is regulated, so that both supplies of air do not mix with the gas in constant unregulated streams, as is the case with other double-airsupply lamp burners. Especially where burners of this class are used for incandescent mantles is such regulation necessary, as the smoke resulting from imperfect combustion is objectionable. The regulator c regulates the amount of gas and the spreader g the amount of air at both sides of the gasstream, all three streams passing out between the spreader g and the top flange of outer burner-tube at opening 4. By adjusting the gas-regulator e the spreader g is also adjusted so as to make a wider or narrower opening between the periphery ofthe spreader and the inner periphery of the top flange of tube 70.

Besides the advantages of regulating the outer as well as the inner air-stream the present invention possesses the advantage that the spreader is of less diameter than the opening in the top flange of tube 76, with the result that the mixture of gas and air is not forced directly outinto the skirt of the mantle at a sacrifice to supplying the upper part and with the danger of breaking the fragile mantle.

A further advantage is that the adjustingstem is in line with the axis of the cylindrical regulator, thus centralizing the latter and avoiding binding orjamming thereof against the inner wick-tube.

What we claim as new is- In a lamp-burner, with two air-supplies, the combination, with the inner and outer wick-tubes, the outer wick-tube extending above the inner Wick-tube and terminated by an inner flange, and the outer burner-tube, flanged at its upper end and extending over the flanged end of the outer wick-tube, of an adjustable cylindrical gas-regulator guided by theupper end of the inner wick-tube, and a spreader carried by and above the gas-regulator, substantially as described.

In testimony whereof We have signed our names to this specification in the presence of 10 two subscribing Witnesses.

HERMAN N HURWITZ. AISIK SCHAPIRO.

Witnesses:

WOLDEMAB, HAUPT, HENRY HASPER. 

